Director Doug Liman had an all-night adventure shooting tonight’s episode of MTV’s “I Just Want My Pants Back.” Because the plot involves a blackout, Liman had electricity shut down over three square blocks of Bushwick for six hours starting at midnight. “It was mostly industrial, but the few residents agreed to have their lights off,” a spy e-mailed. But when Liman needed a shot at sunrise, his car broke down. “He found a building super to drive him around at 5 a.m.,” the spy added. “It was the kindness of a [bribed] stranger in New York!”